Connection between display and power bar board lost

[Rob F]

That looks good, did you check the voltages at the end of the patch cable? You should have about 11.8v on pin 8, 3.1v on pin 5 and 4.9 on pin 3. These are the voltages going into that IC on the power bar, so somewhere they are going from 3.2v and 5.03v to 7v+. There are no components between the RJ45 port voltages the what goes into the IC. So what you get out the RJ45 on the display board is what should be going into that IC.

If you still have the proper voltages at the end of the patch cable plug it into the connector board and test the voltages on the bottom of the RJ45 jack on the connector board. You should have what you have at the RJ45 on the display board.